The site queries the browser as to the browser type and screen resolution and sends back the version of the site that it thinks will fit best on the screen. I expect it is confusing your site for an iPhone with a smaller screen from the information sent to it from Safari on your iPad. I would download and try another browser like Chrome or FireFox to see if it fixes the problem. You may also change settings in Safari to change the info it sends out about itself to sites.
Last edited by twowheels; 05-20-2015 at 04:53 PM.